Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea15b5f6b09adac…

MALICIOUS

PDF

47.1 KB Created: 2020-08-27 16:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c176a37553a4bd1c6c4ed4dc7ee9734e SHA-1: d06e69cec99041aceffc1fbde80c31da6d105d66 SHA-256: 0ea15b5f6b09adac36408dc993fb710b2f300987213daf3e5575973f16aa93c2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.club/pify?keyword=dapple+colored+dachshund'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. The presence of numerous PDF links also indicates a link farm strategy, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/pify?keyword=dapple+colored+dachshund
    • http://files.karronlab.com/uploads/1/3/2/7/132712198/fe02891d05.pdf
    • http://wupipu.award-tutoring.com/uploads/1/3/1/1/131164250/jamudatelosovat_tekosalal_jigevujaf_tijegemaxetixet.pdf
    • http://lonavemib.carllarosa.com/uploads/1/3/0/8/130814328/xavisuxaxapoba.pdf
    • http://files.pyralag.com/uploads/1/3/0/8/130814110/wilekibar.pdf
    • http://files.jomcrogers.com/uploads/1/3/0/7/130776407/914814.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/tabugakupewosuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8125/3535/files/9234297175.pdf
    • https://cdn.shopify.com/s/files/1/0434/5570/9341/files/wugab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5589/files/94549473472.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/sejoralobunotamarof.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/gogezagi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5353/files/80982166272.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/air_bearing_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f17.bin
1b10791ac189850cea30911d7f85306852759d53e77f120bcce1d179cd3b20c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F17 4912 bytes
font_01_sfnt_off00007fb2.bin
d8a857f20e613942a16275c7cbfb827a37a844cf662f7a482295f68340795f62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB2 9812 bytes
font_02_sfnt_off0000a13f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA13F 4324 bytes

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